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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright (C) 2006 The Guava Authors<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.4"></a>
<span class="sourceLineNo">005</span> * you may not use this file except in compliance with the License.<a name="line.5"></a>
<span class="sourceLineNo">006</span> * You may obtain a copy of the License at<a name="line.6"></a>
<span class="sourceLineNo">007</span> *<a name="line.7"></a>
<span class="sourceLineNo">008</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * Unless required by applicable law or agreed to in writing, software<a name="line.10"></a>
<span class="sourceLineNo">011</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.11"></a>
<span class="sourceLineNo">012</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.12"></a>
<span class="sourceLineNo">013</span> * See the License for the specific language governing permissions and<a name="line.13"></a>
<span class="sourceLineNo">014</span> * limitations under the License.<a name="line.14"></a>
<span class="sourceLineNo">015</span> */<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>package com.google.common.base;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import static com.google.common.base.Preconditions.checkNotNull;<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>import com.google.common.annotations.GwtCompatible;<a name="line.21"></a>
<span class="sourceLineNo">022</span><a name="line.22"></a>
<span class="sourceLineNo">023</span>/**<a name="line.23"></a>
<span class="sourceLineNo">024</span> * Utility class for converting between various ASCII case formats.<a name="line.24"></a>
<span class="sourceLineNo">025</span> *<a name="line.25"></a>
<span class="sourceLineNo">026</span> * @author Mike Bostock<a name="line.26"></a>
<span class="sourceLineNo">027</span> * @since 1.0<a name="line.27"></a>
<span class="sourceLineNo">028</span> */<a name="line.28"></a>
<span class="sourceLineNo">029</span>@GwtCompatible<a name="line.29"></a>
<span class="sourceLineNo">030</span>public enum CaseFormat {<a name="line.30"></a>
<span class="sourceLineNo">031</span>  /**<a name="line.31"></a>
<span class="sourceLineNo">032</span>   * Hyphenated variable naming convention, e.g., "lower-hyphen".<a name="line.32"></a>
<span class="sourceLineNo">033</span>   */<a name="line.33"></a>
<span class="sourceLineNo">034</span>  LOWER_HYPHEN(CharMatcher.is('-'), "-") {<a name="line.34"></a>
<span class="sourceLineNo">035</span>    @Override String normalizeWord(String word) {<a name="line.35"></a>
<span class="sourceLineNo">036</span>      return Ascii.toLowerCase(word);<a name="line.36"></a>
<span class="sourceLineNo">037</span>    }<a name="line.37"></a>
<span class="sourceLineNo">038</span>    @Override String convert(CaseFormat format, String s) {<a name="line.38"></a>
<span class="sourceLineNo">039</span>      if (format == LOWER_UNDERSCORE) {<a name="line.39"></a>
<span class="sourceLineNo">040</span>        return s.replace('-', '_');<a name="line.40"></a>
<span class="sourceLineNo">041</span>      }<a name="line.41"></a>
<span class="sourceLineNo">042</span>      if (format == UPPER_UNDERSCORE) {<a name="line.42"></a>
<span class="sourceLineNo">043</span>        return Ascii.toUpperCase(s.replace('-', '_'));<a name="line.43"></a>
<span class="sourceLineNo">044</span>      }<a name="line.44"></a>
<span class="sourceLineNo">045</span>      return super.convert(format, s);<a name="line.45"></a>
<span class="sourceLineNo">046</span>    }<a name="line.46"></a>
<span class="sourceLineNo">047</span>  },<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span>  /**<a name="line.49"></a>
<span class="sourceLineNo">050</span>   * C++ variable naming convention, e.g., "lower_underscore".<a name="line.50"></a>
<span class="sourceLineNo">051</span>   */<a name="line.51"></a>
<span class="sourceLineNo">052</span>  LOWER_UNDERSCORE(CharMatcher.is('_'), "_") {<a name="line.52"></a>
<span class="sourceLineNo">053</span>    @Override String normalizeWord(String word) {<a name="line.53"></a>
<span class="sourceLineNo">054</span>      return Ascii.toLowerCase(word);<a name="line.54"></a>
<span class="sourceLineNo">055</span>    }<a name="line.55"></a>
<span class="sourceLineNo">056</span>    @Override String convert(CaseFormat format, String s) {<a name="line.56"></a>
<span class="sourceLineNo">057</span>      if (format == LOWER_HYPHEN) {<a name="line.57"></a>
<span class="sourceLineNo">058</span>        return s.replace('_', '-');<a name="line.58"></a>
<span class="sourceLineNo">059</span>      }<a name="line.59"></a>
<span class="sourceLineNo">060</span>      if (format == UPPER_UNDERSCORE) {<a name="line.60"></a>
<span class="sourceLineNo">061</span>        return Ascii.toUpperCase(s);<a name="line.61"></a>
<span class="sourceLineNo">062</span>      }<a name="line.62"></a>
<span class="sourceLineNo">063</span>      return super.convert(format, s);<a name="line.63"></a>
<span class="sourceLineNo">064</span>    }<a name="line.64"></a>
<span class="sourceLineNo">065</span>  },<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>
<span class="sourceLineNo">067</span>  /**<a name="line.67"></a>
<span class="sourceLineNo">068</span>   * Java variable naming convention, e.g., "lowerCamel".<a name="line.68"></a>
<span class="sourceLineNo">069</span>   */<a name="line.69"></a>
<span class="sourceLineNo">070</span>  LOWER_CAMEL(CharMatcher.inRange('A', 'Z'), "") {<a name="line.70"></a>
<span class="sourceLineNo">071</span>    @Override String normalizeWord(String word) {<a name="line.71"></a>
<span class="sourceLineNo">072</span>      return firstCharOnlyToUpper(word);<a name="line.72"></a>
<span class="sourceLineNo">073</span>    }<a name="line.73"></a>
<span class="sourceLineNo">074</span>  },<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span>  /**<a name="line.76"></a>
<span class="sourceLineNo">077</span>   * Java and C++ class naming convention, e.g., "UpperCamel".<a name="line.77"></a>
<span class="sourceLineNo">078</span>   */<a name="line.78"></a>
<span class="sourceLineNo">079</span>  UPPER_CAMEL(CharMatcher.inRange('A', 'Z'), "") {<a name="line.79"></a>
<span class="sourceLineNo">080</span>    @Override String normalizeWord(String word) {<a name="line.80"></a>
<span class="sourceLineNo">081</span>      return firstCharOnlyToUpper(word);<a name="line.81"></a>
<span class="sourceLineNo">082</span>    }<a name="line.82"></a>
<span class="sourceLineNo">083</span>  },<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>  /**<a name="line.85"></a>
<span class="sourceLineNo">086</span>   * Java and C++ constant naming convention, e.g., "UPPER_UNDERSCORE".<a name="line.86"></a>
<span class="sourceLineNo">087</span>   */<a name="line.87"></a>
<span class="sourceLineNo">088</span>  UPPER_UNDERSCORE(CharMatcher.is('_'), "_") {<a name="line.88"></a>
<span class="sourceLineNo">089</span>    @Override String normalizeWord(String word) {<a name="line.89"></a>
<span class="sourceLineNo">090</span>      return Ascii.toUpperCase(word);<a name="line.90"></a>
<span class="sourceLineNo">091</span>    }<a name="line.91"></a>
<span class="sourceLineNo">092</span>    @Override String convert(CaseFormat format, String s) {<a name="line.92"></a>
<span class="sourceLineNo">093</span>      if (format == LOWER_HYPHEN) {<a name="line.93"></a>
<span class="sourceLineNo">094</span>        return Ascii.toLowerCase(s.replace('_', '-'));<a name="line.94"></a>
<span class="sourceLineNo">095</span>      }<a name="line.95"></a>
<span class="sourceLineNo">096</span>      if (format == LOWER_UNDERSCORE) {<a name="line.96"></a>
<span class="sourceLineNo">097</span>        return Ascii.toLowerCase(s);<a name="line.97"></a>
<span class="sourceLineNo">098</span>      }<a name="line.98"></a>
<span class="sourceLineNo">099</span>      return super.convert(format, s);<a name="line.99"></a>
<span class="sourceLineNo">100</span>    }<a name="line.100"></a>
<span class="sourceLineNo">101</span>  };<a name="line.101"></a>
<span class="sourceLineNo">102</span><a name="line.102"></a>
<span class="sourceLineNo">103</span>  private final CharMatcher wordBoundary;<a name="line.103"></a>
<span class="sourceLineNo">104</span>  private final String wordSeparator;<a name="line.104"></a>
<span class="sourceLineNo">105</span><a name="line.105"></a>
<span class="sourceLineNo">106</span>  CaseFormat(CharMatcher wordBoundary, String wordSeparator) {<a name="line.106"></a>
<span class="sourceLineNo">107</span>    this.wordBoundary = wordBoundary;<a name="line.107"></a>
<span class="sourceLineNo">108</span>    this.wordSeparator = wordSeparator;<a name="line.108"></a>
<span class="sourceLineNo">109</span>  }<a name="line.109"></a>
<span class="sourceLineNo">110</span><a name="line.110"></a>
<span class="sourceLineNo">111</span>  /**<a name="line.111"></a>
<span class="sourceLineNo">112</span>   * Converts the specified {@code String str} from this format to the specified {@code format}. A<a name="line.112"></a>
<span class="sourceLineNo">113</span>   * "best effort" approach is taken; if {@code str} does not conform to the assumed format, then<a name="line.113"></a>
<span class="sourceLineNo">114</span>   * the behavior of this method is undefined but we make a reasonable effort at converting anyway.<a name="line.114"></a>
<span class="sourceLineNo">115</span>   */<a name="line.115"></a>
<span class="sourceLineNo">116</span>  public final String to(CaseFormat format, String str) {<a name="line.116"></a>
<span class="sourceLineNo">117</span>    checkNotNull(format);<a name="line.117"></a>
<span class="sourceLineNo">118</span>    checkNotNull(str);<a name="line.118"></a>
<span class="sourceLineNo">119</span>    return (format == this) ? str : convert(format, str);<a name="line.119"></a>
<span class="sourceLineNo">120</span>  }<a name="line.120"></a>
<span class="sourceLineNo">121</span><a name="line.121"></a>
<span class="sourceLineNo">122</span>  /**<a name="line.122"></a>
<span class="sourceLineNo">123</span>   * Enum values can override for performance reasons.<a name="line.123"></a>
<span class="sourceLineNo">124</span>   */<a name="line.124"></a>
<span class="sourceLineNo">125</span>  String convert(CaseFormat format, String s) {<a name="line.125"></a>
<span class="sourceLineNo">126</span>    // deal with camel conversion<a name="line.126"></a>
<span class="sourceLineNo">127</span>    StringBuilder out = null;<a name="line.127"></a>
<span class="sourceLineNo">128</span>    int i = 0;<a name="line.128"></a>
<span class="sourceLineNo">129</span>    int j = -1;<a name="line.129"></a>
<span class="sourceLineNo">130</span>    while ((j = wordBoundary.indexIn(s, ++j)) != -1) {<a name="line.130"></a>
<span class="sourceLineNo">131</span>      if (i == 0) {<a name="line.131"></a>
<span class="sourceLineNo">132</span>        // include some extra space for separators<a name="line.132"></a>
<span class="sourceLineNo">133</span>        out = new StringBuilder(s.length() + 4 * wordSeparator.length());<a name="line.133"></a>
<span class="sourceLineNo">134</span>        out.append(format.normalizeFirstWord(s.substring(i, j)));<a name="line.134"></a>
<span class="sourceLineNo">135</span>      } else {<a name="line.135"></a>
<span class="sourceLineNo">136</span>        out.append(format.normalizeWord(s.substring(i, j)));<a name="line.136"></a>
<span class="sourceLineNo">137</span>      }<a name="line.137"></a>
<span class="sourceLineNo">138</span>      out.append(format.wordSeparator);<a name="line.138"></a>
<span class="sourceLineNo">139</span>      i = j + wordSeparator.length();<a name="line.139"></a>
<span class="sourceLineNo">140</span>    }<a name="line.140"></a>
<span class="sourceLineNo">141</span>    return (i == 0)<a name="line.141"></a>
<span class="sourceLineNo">142</span>      ? format.normalizeFirstWord(s)<a name="line.142"></a>
<span class="sourceLineNo">143</span>      : out.append(format.normalizeWord(s.substring(i))).toString();<a name="line.143"></a>
<span class="sourceLineNo">144</span>  }<a name="line.144"></a>
<span class="sourceLineNo">145</span><a name="line.145"></a>
<span class="sourceLineNo">146</span>  abstract String normalizeWord(String word);<a name="line.146"></a>
<span class="sourceLineNo">147</span><a name="line.147"></a>
<span class="sourceLineNo">148</span>  private String normalizeFirstWord(String word) {<a name="line.148"></a>
<span class="sourceLineNo">149</span>    return (this == LOWER_CAMEL) ? Ascii.toLowerCase(word) : normalizeWord(word);<a name="line.149"></a>
<span class="sourceLineNo">150</span>  }<a name="line.150"></a>
<span class="sourceLineNo">151</span><a name="line.151"></a>
<span class="sourceLineNo">152</span>  private static String firstCharOnlyToUpper(String word) {<a name="line.152"></a>
<span class="sourceLineNo">153</span>    return (word.isEmpty())<a name="line.153"></a>
<span class="sourceLineNo">154</span>        ? word<a name="line.154"></a>
<span class="sourceLineNo">155</span>        : new StringBuilder(word.length())<a name="line.155"></a>
<span class="sourceLineNo">156</span>            .append(Ascii.toUpperCase(word.charAt(0)))<a name="line.156"></a>
<span class="sourceLineNo">157</span>            .append(Ascii.toLowerCase(word.substring(1)))<a name="line.157"></a>
<span class="sourceLineNo">158</span>            .toString();<a name="line.158"></a>
<span class="sourceLineNo">159</span>  }<a name="line.159"></a>
<span class="sourceLineNo">160</span>}<a name="line.160"></a>




























































</pre>
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